JP2023047776A - wooden framework - Google Patents

Abstract

To provide a wooden framework having a wooden panel connected to a frame in a column-exposed style and capable of reducing both material cost and connection labor for a connector.SOLUTION: A wooden framework 100 is formed by a frame 90 including a wooden pole 10 and a wooden beam 20 or a foundation 30, a wooden panel 40 is arranged in a column-exposed style at the frame 90, and the wooden panel 40 is fixed to the pole 10 with a shaft-like fixing member 50 penetrating the pole 10 from a lateral surface 12 of the pole 10 at the outer side in an in-plane direction of the frame 90 and leading to the inside of the wooden panel 40.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wooden frame structure.

In the wooden frame structure by the wooden frame construction method, wooden panels such as structural plywood are joined by nails etc. as load-bearing walls inside the frame structure composed of wooden shaft members such as wooden columns and wooden beams or foundations. In general, a form that uses braces or a form that provides braces is generally applied. When a thick wooden panel such as CLT (Cross Laminated Timber) is applied to the load-bearing wall, if the large wall type is used, the wall thickness of the frame becomes unnecessarily large, which is uneconomical. Therefore, wooden panels are installed in the frame in the form of a solid wall so that they fit within the width of the columns and beams of the frame.

When joining the frame and wooden panels in this straight wall format, steel plates with pin holes are attached to wooden shaft members such as beams and columns, and storage grooves are provided at the ends of the wooden panels to accommodate the steel plates. 2) A method in which the wooden shaft member and the wooden panel are brought into contact with each other while housing the steel plate in the accommodation groove, and then the connecting metal fittings such as bolts and screws are inserted from the outside of the wooden shaft member and the connecting metal fittings are inserted through the pin holes to join. is commonly used.

More specifically, the steel plate (for example, the first steel plate) fixed to the side surface of the wooden shaft member and the steel plate (for example, the second steel plate) accommodated in the accommodation groove of the wooden panel are integrally welded to each other. The steel plate unit is applied, and the connection between the first steel plate and the wood shaft member and the connection between the second steel plate and the wood panel are connected by connecting fittings unique to each. In other words, when connecting wooden panels to a frame in the straight wall format, a steel plate unit is required instead of a single steel plate, and two types of connection fittings are required. The problem is the connection time.

In view of the above, there is a demand for a technique that can reduce both the material cost and the labor required for connecting fittings in a wooden frame structure in which wooden panels are connected to the frame in a solid wall format.

Here, Patent Document 1 proposes a CLT structure. This CLT structure consists of a concrete foundation having horizontally extending reinforcing bars, a panel material in which sawn boards are laminated and bonded together, and a wall having a slit extending along the longitudinal direction in the lower end surface. A panel, a joint plate partly embedded in the foundation, and at least a part of the flat joint plate part protruding upward from the upper surface of the foundation, and a joint plate part protruding from the upper surface of the foundation into the slit of the wall panel A connection member made of a drift pin that connects the joint plate portion and the wall panel in the inserted state is provided. The joint plate portion is positioned above the reinforcing bar member with its longitudinal direction along the direction in which the reinforcing bar member extends. and an anchor member embedded in the foundation and extending downward from the collar, the lower end of the anchor member being positioned below the reinforcing member.

JP 2020-172743 A

Even in the CLT structure described in Patent Document 1, when connecting the wall panel and the foundation, a connection metal fitting consisting of a joint plate portion and a flange portion is required, and two types of connection metal fittings such as a drift pin and an anchor member are required. do not have.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a wooden frame structure in which wooden panels are connected to the frame in a straight wall format, and which can reduce both the material cost and the labor required for connecting fittings. intended to provide.

In order to achieve the above object, one aspect of the wooden frame structure according to the present invention includes:
A wooden frame frame structure formed by a frame structure including wooden columns and wooden beams or foundations,
A wooden panel is arranged in the frame in a straight wall format, and the wooden panel is a shaft-shaped fixing member that penetrates the column from the side surface of the frame on the in-plane direction of the column and leads to the inside of the wooden panel. is fixed to the pillar by

According to this aspect, in the wooden frame structure in which the wooden panel is arranged in the frame in a straight wall format, the wooden panel penetrates the column from the side surface of the frame on the in-plane direction of the column and enters the wooden panel. Since it is fixed to the pillars by shaft-shaped fixing members that extend through it, it is possible to eliminate the need for a steel plate unit in which multiple steel plates are welded to each other. Since it is fixed, it is possible to reduce both the material cost required for the connector and the labor required for connection. Here, a bolt, a screw, a nail, a drift pin, or the like can be applied to the axial fixing member. Also, structural plywood, laminated lumber (a material obtained by fixing a plurality of lumbers with an adhesive, screws, etc.), a CLT panel, or the like can be applied to the wooden panel.

Another aspect of the wooden frame structure according to the present invention is
A through hole is provided in the pillar,
A shaft-shaped groove is provided from the end of the wooden panel to the inside,
A communication hole is formed by positioning the through hole and the shaft-shaped groove, and the shaft-shaped fixing member is inserted through the communication hole and fixed by driving.

According to this aspect, the through hole provided in advance in the pillar and the shaft-shaped groove provided in advance in the wooden panel are mutually positioned to form the communication hole, and the shaft-shaped fixing member is inserted through the communication hole. , the shaft-like fixing member can be driven into a desired driving position with high accuracy and efficiency.

Another aspect of the wooden frame structure according to the present invention is
The wooden panel is fixed to the pillars on the left and right sides of the wooden panel by the shaft-like fixing members.

According to this aspect, since the wooden panel is fixed to the pillars on the left and right sides of the wooden panel, the fixing strength of the wooden panel fixed only to the pillars constituting the frame can be increased.

Another aspect of the wooden frame structure according to the present invention is
A first shear plate is embedded in the wooden panel, and a part of the first shear plate faces an interface between the wooden panel and the pillar,
It is characterized in that the shaft-shaped fixing member penetrates the first shear plate.

According to this aspect, the first shear plate is embedded in the wooden panel facing the interface between the wooden panel and the pillar, and the shaft-like fixing member penetrates the first shear plate to connect the pillar and the wooden panel. As a result, the shear resistance of the shaft-shaped fixing member can be improved, and the required number of shaft-shaped fixing members can be reduced. Although it is conceivable that the first shear plate is embedded in either the wooden panel or the pillar, it is preferable to embed the first shear plate in the wooden panel because the wooden panel is generally softer than the pillar.

Another aspect of the wooden frame structure according to the present invention is
A second shear plate is embedded in the pillar, and a part of the second shear plate faces an interface between the pillar and the wooden panel,
It is characterized in that the shaft-shaped fixing member penetrates both the second shear plate and the first shear plate.

According to this aspect, in addition to embedding the first shear plate in the wooden panel, the second shear plate is embedded in the pillar, and the first shear plate and the second shear plate are formed at the interface between the pillar and the wooden panel. The shaft-shaped fixing member connects the pillar and the wooden panel while penetrating the first shear plate and the second shear plate in the abutting state, so that the shear strength of the shaft-shaped fixing member can be further improved. , it is possible to further reduce the required number of shaft-shaped fixing members.

Another aspect of the wooden frame structure according to the present invention is
The axial fixing member is a drift pin.

According to this aspect, since the shaft-like fixing member is a drift pin, it is possible to increase the connection strength between the pillar and the wooden panel. Further, the shaft-like fixing is inserted through a communicating hole formed by mutually positioning a through-hole provided in advance in the pillar and a shaft-like groove provided in advance in the wooden panel, and is driven and fixed. A drift pin is suitable as the member.

In another aspect of the wooden frame structure according to the present invention,
The wooden panel and the beam or the base are fixed by tenon pipes.

According to this aspect, since the wooden panel and the beam or base are fixed by the tenon pipe, the shear force generated in the wooden panel can be borne by the tenon pipe.

Another aspect of the wooden frame structure according to the present invention is
The wooden panel is a CLT panel.

According to this aspect, since the wooden panel is a CLT panel, a wide range of panels with vertical and horizontal dimensions of, for example, 12 m x 2.6 m can be applied, so the number of connection points between panels on the site can be reduced as much as possible. can do. As a result, it is possible to improve the strength of the wooden frame structure and the construction efficiency. In addition, since a plurality of plate materials are laminated in such a manner that the fiber directions of the CLT panel intersect (perpendicularly), the CLT panel is resistant to deformation and suitable as a load-bearing wall.

In another aspect of the wooden frame structure according to the present invention,
The front view shape of the wooden panel is a rectangle,
The four corners of the rectangle are notched.

According to this aspect, since the four corners of the wooden panel, which is rectangular in front view, are notched, when the wooden frame structure is deformed during an earthquake, the corners of the wooden panel may be removed from the beams, the foundation, or the like. It is possible to eliminate the load increase due to the compressive force caused by contacting and pressing against each other.

As can be understood from the above description, according to the wooden frame structure of the present invention, in a wooden frame structure in which wooden panels are connected to a frame in a solid wall format, both the material cost and the labor required for connecting fittings are reduced. can do.

1 is a front view showing an example of a wooden frame structure according to a first embodiment; FIG. FIG. 2 is a view taken along line II-II in FIG. 1, and is a view for explaining a state in which a pillar and a wooden panel are fixed by a shaft-like fixing member. Both (a) and (b) are diagrams for explaining a state in which a shear plate is provided at the interface between a pillar and a wooden panel and both are fixed by a shaft-like fixing member. 1 is a perspective view of an example shear plate; FIG. 1 is a structural model diagram of an example of a wooden frame structure according to a first embodiment; FIG. It is a front view which shows an example of the wooden framework structure which concerns on 2nd Embodiment. FIG. 10 is a structural model diagram of an example of a wooden frame structure according to a second embodiment;

An example of a wooden frame structure according to each embodiment will be described below with reference to the accompanying drawings. In addition, in the present specification and drawings, substantially the same components may be denoted by the same reference numerals, thereby omitting duplicate descriptions.

[Wooden framework according to the first embodiment]
First, an example of a wooden frame structure according to a first embodiment will be described with reference to FIGS. 1 to 5. FIG. Here, FIG. 1 is a front view showing an example of a wooden frame structure according to the first embodiment, and FIG. 2 is a view taken along line II-II in FIG. It is a figure explaining the state which the fixing member is fixing.

The wooden frame structure 100 is formed by a frame structure 90 including wooden columns 10, wooden beams 20 and a base 30, and wood panels 40 are arranged in the frame structure 90 in a straight wall format. Here, the illustrated example shows the frame 90 of the first floor of the building, but when the frame of the upper floor of the building of two or more stories is targeted, the frame is formed by left and right columns and upper and lower beams.

The left and right side surfaces 41 of the wooden panel 40 are in contact with the left and right pillars 10 , the upper surface 42 is in contact with the beam 20 , and the lower surface 43 is in contact with the base 30 . It is fixed to the left and right pillars 10 in contact with 41 . More specifically, the wooden panel 40 is fixed by a drift pin 50 (an example of a shaft-like fixing member) that penetrates the pillar 10 and leads to the inside of the wooden panel 40 from the side surface 12 of the pillar 10 on the outside in the in-plane direction of the frame 90 . is fixed to the column 10.

The wooden panel 40 has a rectangular shape in front view, and has a height of h and a width of d. Structural plywood, laminated lumber, CLT panels, etc. can be applied to the wooden panel 40, but a wide range of panels with vertical and horizontal dimensions of up to 12 m x 2.6 m can be used, and the connection points between the panels at the site can be used as much as possible. CLT panels are suitable because they can be reduced to 100%, which leads to improvement in the yield strength of the wooden framework 100 and improvement in construction efficiency.

The center-to-center distance D of the left and right pillars 10 has a plurality of forms ranging from 0.5 m to 2.0 m, for example, 0.5 m, 0.75 m, 1.0 m, 1.5 m, and 2.0 m. morphology.

Notches 44 are provided at four corners of the wooden panel 40 . Due to the cutouts 44 at the corners, the corners of the wooden panels 40 come into contact with the left and right pillars 10, beams 20, and foundation 30 when horizontal force F acts on the wooden framework 100 during an earthquake and deforms it. It is possible to prevent the load from increasing due to the compressive force caused by contacting and pressing each other.

As shown in FIG. 1, the height h1 of the notch 44 is set to d/30 (1/30 radian) with respect to the width d of the wooden panel 40. As shown in FIG. According to the empirical rule of the present inventors, when the notch 44 is set at 1/30 radian, when the frame 90 is deformed during an earthquake, the corners of the wooden panel 40 will not touch the beam 20 or the base 30. It is known not to abut and relied on this rule of thumb.

The length of the central region of the upper surface 42 and the lower surface 43 of the wooden panel 40 excluding the left and right cutouts 44 is set to d/2 (so that the length of the central region becomes d/2). , the length of the notch 44 is set).

As shown in FIG. 2, a through-hole 15 is provided in the pillar 10, and a shaft-shaped groove 45 is provided from the end of the wooden panel 40 to the inside thereof. A hole 18 is formed. Here, the lengths of the through hole 15 and the axial groove 45 are set to be the same or substantially the same.

A drift pin 50 is inserted through the communication hole 18 and fixed by driving.

As shown in FIG. 1 , the left and right pillars 10 and the wooden panel 40 are fixed by a plurality of drift pins 50 . Here, the number of drift pins 50 on each of the right and left sides of the wooden panel 40 can be set by the following two calculation formulas.

Specifically, the yield strength Py of the joint between the CLT panel and the column in the wooden frame structure 100 when the horizontal force F acts during an earthquake can be expressed by the following formula (1).

In Equation (1), ny×py corresponds to shear yield strength Qy of all drift pins in FIG.

On the other hand, in the seismic performance of wooden buildings, the inter-story deformation angle at the time of an earthquake: 1/150 is a general index, so the stiffness P ₁₅₀ of the joint between the CLT panel and the column is calculated by the following formula (2). can be represented.

The required number of drift pins 50 is set by taking the smaller one of the above equations (1) and (2) as the design proof stress.

FIGS. 3(a) and 3(b) illustrate a joining form that improves the shear strength at the interface between the pillar 10 and the wooden panel 40. FIG. Here, both FIGS. 3A and 3B are diagrams illustrating a state in which a shear plate is provided at the interface between a pillar and a wooden panel, and both are fixed by a shaft-shaped fixing member.

In the form shown in FIG. 3A, the first shear plate 55A (the shear plate 55) is embedded in the wooden panel 40, and the first shear plate 55A faces the side surface 41 of the wooden panel 40 (the interface with the pillar 10). there is

As shown in FIG. 4, the shear plate 55 has a disk 55a with pin holes 55c and a cylindrical wall 55b standing along the contour of the disk 55a. The cylindrical wall 55b is embedded inside the wooden panel 40, the rear surface of the disk 55a faces the interface with the column 10, and the drift pin 50 is embedded inside the wooden panel 40 through the pin hole 55c.

On the other hand, in the form shown in FIG. 3B, in addition to the first shear plate 55A embedded in the wooden panel 40, a separate second shear plate 55B (the shear plate 55) is embedded in the column 10, The disk 55a of the second shear plate 55B also faces the interface with the wooden panel 40, and the rear surfaces of the disks 55a of both the first shear plate 55A and the second shear plate 55B are in contact with each other at the interface. The drift pins 50 pass through the pin holes 55c of both discs 55a and are embedded inside the wooden panel 40. As shown in FIG.

3(a) and 3(b), one or two shear plates 55 improve the shear strength of the interface between the pillar 10 and the wooden panel 40, resulting in drift pin calculated in design. It becomes possible to reduce the required number of 50.

Here, the inventors of the present invention have investigated drift in a form reinforced by one shear plate 55 shown in FIG. 3(a) and a form reinforced by two shear plates 55 shown in FIG. Verification experiments are being conducted to determine the load capacity per pin.

As a result, in the form of FIG. 3(a), when the drift pin is displaced by about 5 mm, the maximum withstand load is about 12 kN, after which plastic deformation occurs.

On the other hand, in the form of FIG. 3(b), when the drift pin is displaced by about 10 mm, the maximum withstand load is about 15 kN, after which plastic deformation occurs.

That is, even if the number of shear plates 55 is doubled, the withstand load is only increased by about 1.3 times.

In addition, since the wooden panel 40 is generally softer than the pillar 10, when one shear plate 55 is provided at the interface as shown in FIG. is preferred.

FIG. 5 is a diagram showing an example of a structural model of the wooden frame structure 100 shown in FIG. In the structural model M1, the connection (shiguchi) of the pillar C to the beam B1 and the base B2 can be done by joints such as mortise joints, sickle joints, and dovetail joints, or joints through joint metal fittings such as tenon pipes. There are various forms, but all of them are pin P1 on the structural model.

On the other hand, the connection between the left and right pillars C and the wooden panel W by a plurality of drift pins can be modeled by a spring Sp.

According to the wooden frame structure 100 shown in FIG. Since the steel plate unit and the like can be fixed to each other without using a connection jig, and the pillar 10 and the wooden panel 40 can be fixed with one type of shaft-shaped fixing member, the material cost and connection labor required for the connection tool can be reduced. can be reduced.

[Wooden framework according to the second embodiment]
Next, an example of the wooden frame structure according to the second embodiment will be described with reference to FIGS. 6 and 7. FIG. Here, FIG. 6 is a front view showing an example of the wooden frame structure according to the second embodiment.

The wooden frame structure 100A differs from the wooden frame frame structure 100 in that the wooden panels 40, the beams 20, and the base 30 are fixed via tenon pipes 60. FIG.

A pin hole (not shown) is formed in the tenon pipe 60, and a pin 65 such as a drift pin is inserted into the pin hole so that the tenon pipe 60 is fixed to the beam 20 and the base 30 while being fixed to the beam 20 and the base. 30 and the upper surface 42 and the lower surface 43 of the wooden panel 40 are fixed.

In the illustrated example, two tenon pipes 60 are provided on each of the upper surface 42 and the lower surface 43 of the wooden panel 40, but the number of tenon pipes 60 is not limited to the illustrated example. Further, when the diameter of the tenon pipe 60 is φ, the distance d2 between the two tenon pipes 60 is set to 5φ or more, and the distance d1 between the tenon pipe 60 and the notch 44 is set to 2.5φ or more. be.

As shown in FIG. 6, by fixing the upper and lower surfaces of the wooden panel 40 to the beams 20 and the base 30 with tenon pipes 60, deformation of the frame 90 during an earthquake acts on the interface between the wooden panel 40 and the beams 20, etc. The tenon pipe 60 can bear the shearing force S to be applied.

FIG. 7 is a diagram showing an example of a structural model of the wooden frame structure 100A. The structural model M2 can be formed by adding a pin P2 modeling a tenon pipe to the structural model M1 shown in FIG.

It should be noted that other embodiments may be possible in which other components are combined with the configurations described in the above embodiments, and the present invention is not limited to the configurations shown here. Regarding this point, it is possible to change without departing from the gist of the present invention, and it can be determined appropriately according to the application form.

10: Column 11: Side 12: Side (outer side in the in-plane direction)
15: Through hole 18: Communication hole 20: Beam 30: Base 40: Wood panel (CLT panel)
41: Side surface 42: Upper surface 43: Lower surface 44: Notch 45: Shaft-shaped groove 50: Shaft-shaped fixing member (drift pin)
55: Shear plate 55A: First shear plate 55B: Second shear plate 55a: Disk 55b: Cylindrical wall 55c: Pin hole 60: Tenon pipe 65: Pin 90: Frame structure 100, 100A: Wooden frame frame structure F: Horizontal force Py : Yield strength Qy: Shear yield strength S: Shear force M1, M2: Structural model

Claims (9)

A wooden frame frame structure formed by a frame structure including wooden columns and wooden beams or foundations,
A wooden panel is arranged in the frame in a straight wall format, and the wooden panel is a shaft-shaped fixing member that penetrates the column from the side surface of the frame on the in-plane direction of the column and leads to the inside of the wooden panel. A wooden framework, characterized in that it is fixed to the pillars by A through hole is provided in the pillar,
A shaft-shaped groove is provided from the end of the wooden panel to the inside,
2. The wooden shaft according to claim 1, wherein the through hole and the shaft-shaped groove are positioned to form a communication hole, and the shaft-shaped fixing member is inserted through the communication hole and fixed by driving. frame structure. 3. The wooden frame structure according to claim 1, wherein said wooden panel is fixed by said shaft-like fixing members to said pillars on the left and right sides of said wooden panel. A first shear plate is embedded in the wooden panel, and a part of the first shear plate faces an interface between the wooden panel and the pillar,
The wooden frame structure according to any one of claims 1 to 3, wherein the shaft-shaped fixing member penetrates the first shear plate. A second shear plate is embedded in the pillar, and a part of the second shear plate faces an interface between the pillar and the wooden panel,
5. The wooden frame structure according to claim 4, wherein said shaft-shaped fixing member penetrates both said second shear plate and said first shear plate. The wooden frame structure according to any one of claims 1 to 5, wherein the shaft-like fixing member is a drift pin. The wooden frame structure according to any one of claims 1 to 6, characterized in that said wooden panel and said beam or said base are fixed by tenon pipes. The wooden frame structure according to any one of claims 1 to 7, characterized in that said wood panel is a CLT panel. The front view shape of the wooden panel is a rectangle,
The wooden frame structure according to any one of claims 1 to 8, characterized in that four corners of said rectangle are notched.

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